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Subject[PATCH v2] gen_compile_command: Add support for separate KBUILD_OUTPUT directory
Date
gen_compile_command.py currently assumes that the .cmd files and the
source code live in the same directory, which is not the case when
a separate KBUILD_OUTPUT directory is used.

Add a new option to specify this the kbuild output directory. If the
option is not set the kernel source directory is used.

Signed-off-by: Matthias Kaehlcke <mka@chromium.org>
Reviewed-by: Tom Roeder <tmroeder@google.com>
Tested-by: Tom Roeder <tmroeder@google.com>
Acked-by: Nick Desaulniers <ndesaulniers@google.com>
---
Changes in v2:
- added trailing space to help strings
- added tags from Tom and Nick
---
scripts/gen_compile_commands.py | 28 +++++++++++++++++++---------
1 file changed, 19 insertions(+), 9 deletions(-)

diff --git a/scripts/gen_compile_commands.py b/scripts/gen_compile_commands.py
index 7915823b92a5..47f37db6bd3a 100755
--- a/scripts/gen_compile_commands.py
+++ b/scripts/gen_compile_commands.py
@@ -31,15 +31,21 @@ def parse_arguments():

Returns:
log_level: A logging level to filter log output.
- directory: The directory to search for .cmd files.
+ source_directory: The kernel source directory.
+ kbuild_output_directory: The directory to search for .cmd files.
output: Where to write the compile-commands JSON file.
"""
usage = 'Creates a compile_commands.json database from kernel .cmd files'
parser = argparse.ArgumentParser(description=usage)

- directory_help = ('Path to the kernel source directory to search '
+ directory_help = ('Path to the kernel source directory '
'(defaults to the working directory)')
parser.add_argument('-d', '--directory', type=str, help=directory_help)
+ kbuild_output_directory_help = ('Path to the directory to search for '
+ '.cmd files '
+ '(defaults to the kernel source directory)')
+ parser.add_argument('-k', '--kbuild-output-directory', type=str,
+ help=kbuild_output_directory_help)

output_help = ('The location to write compile_commands.json (defaults to '
'compile_commands.json in the search directory)')
@@ -58,11 +64,14 @@ def parse_arguments():
if log_level not in _VALID_LOG_LEVELS:
raise ValueError('%s is not a valid log level' % log_level)

- directory = args.directory or os.getcwd()
- output = args.output or os.path.join(directory, _DEFAULT_OUTPUT)
- directory = os.path.abspath(directory)
+ source_directory = args.directory or os.getcwd()
+ output = args.output or os.path.join(source_directory, _DEFAULT_OUTPUT)
+ source_directory = os.path.abspath(source_directory)

- return log_level, directory, output
+ kbuild_output_directory = args.kbuild_output_directory or source_directory
+ kbuild_output_directory = os.path.abspath(kbuild_output_directory)
+
+ return log_level, source_directory, kbuild_output_directory, output


def process_line(root_directory, file_directory, command_prefix, relative_path):
@@ -109,7 +118,8 @@ def process_line(root_directory, file_directory, command_prefix, relative_path):

def main():
"""Walks through the directory and finds and parses .cmd files."""
- log_level, directory, output = parse_arguments()
+ log_level, source_directory, kbuild_output_directory, output = \
+ parse_arguments()

level = getattr(logging, log_level)
logging.basicConfig(format='%(levelname)s: %(message)s', level=level)
@@ -118,7 +128,7 @@ def main():
line_matcher = re.compile(_LINE_PATTERN)

compile_commands = []
- for dirpath, _, filenames in os.walk(directory):
+ for dirpath, _, filenames in os.walk(kbuild_output_directory):
for filename in filenames:
if not filename_matcher.match(filename):
continue
@@ -131,7 +141,7 @@ def main():
continue

try:
- entry = process_line(directory, dirpath,
+ entry = process_line(source_directory, dirpath,
result.group(1), result.group(2))
compile_commands.append(entry)
except ValueError as err:
--
2.22.0.410.gd8fdbe21b5-goog
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